Barrel for writing instrument



FIG. 1 is a perspective view of my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side view thereof; the left side view being a minor image;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The horizontal line extending across the barrel of the writing instrument defines the bounds of the claimed design. The outline of a writing instrument shown in dashed lines in FIGS. 1, 2, 3, 4 and 6 illustrates environmental matter. None of the dashed-line subject matter forms a part of the claimed design. 

The ornamental design for a barrel for writing instrument, as shown and described. 